RESUMEN

PURPOSE: This study aimed to conduct a comparative analysis of audiological and postoperative clinical outcomes between the endoscopic and microscopic stapedotomy approaches. METHODS: This study employed a randomized, controlled design. Twenty-seven patients with bilateral otosclerosis underwent stapedotomy in both ears, with randomized allocation of the surgical technique (endoscopic vs. microscopic) for the first operated ear. Air-bone gap (ABG) and ABG gain were measured at least 12 months postoperatively. Postoperative outcomes including pain (Visual Analog Scale-VAS), dizziness, early-term (day 1) and late-term (6 months) dysgeusia were evaluated. The Glasgow Benefit Inventory (GBI) assessed health-related quality of life at one month postoperatively, and operative time was measured. RESULTS: This study compared endoscopic (n = 27 ears) and microscopic (n = 27 ears) stapedotomy for otosclerosis. Both groups achieved similar hearing improvement with no significant differences in pre-operative and post-operative bone/air conduction thresholds, ABG, and ABG gain (all p > 0.05). The endoscopic stapedotomy group demonstrated reduced postoperative pain (lower VAS scores, p < 0.001), lower early dysgeusia (3.7% vs. 33.3%, p = 0.005), shorter operative time (47.3 vs. 75.4 min, p < 0.001) and improved patient-reported outcomes (higher GBI score, p = 0.014) when compared to microscopic stapedotomy group. No significant differences were observed in postoperative dizziness or late-term dysgeusia between groups. CONCLUSION: This study found similar hearing improvement with both endoscopic and microscopic stapedotomy for otosclerosis. However, the endoscopic approach showed advantages in reduced postoperative pain, early dysgeusia, and operative time, with improved patient-reported quality of life. These findings suggest endoscopic stapedotomy as a valuable alternative to the conventional microscopic approach.